Cut flowers like chrysanthemums and zinnias have a relatively long vase life of 21-28 days. Their longevity depends on how they are cut and cared for and where they are placed while in a vase. Tall Allium flowers and orchids have a similar vase life, lasting 14 – 21 days. Alstroemeria is also considered a long-lasting cut flower, lasting up to 14 days. Their dense blooms make an excellent backdrop for offsetting purple roses and lilies.